M95320-DF datasheet(10/43 Pages) STMICROELECTRONICS

Il numero della parte	M95320-DF

Spiegazioni elettronici	Automotive 32-Kbit serial SPI bus EEPROMs with high-speed clock

PDF	43 Pages

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Produttore elettronici	STMICROELECTRONICS [STMicroelectronics]

Homepage	http://www.st.com

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10 / 43 page

Operating features

M95320-A125 M95320-A145

10/43

DocID022938 Rev 8

Operating features

3.1

Active power and Standby power modes

When Chip Select (S) is low, the device is selected and in the Active power mode.

When Chip Select (S) is high, the device is deselected. If a Write cycle is not currently in

progress, the device then goes in to the Standby power mode, and the device consumption

drops to ICC1, as specified in Table 13 and Table 14.

3.2

SPI modes

The device can be driven by a microcontroller with its SPI peripheral running in either of the

two following modes:

•

CPOL=0, CPHA=0

•

CPOL=1, CPHA=1

For these two modes, input data is latched in on the rising edge of Serial Clock (C), and

output data is available from the falling edge of Serial Clock (C).

The difference between the two modes, as shown in Figure 3, is the clock polarity when the

bus master is in Stand-by mode and not transferring data:

•

C remains at 0 for (CPOL=0, CPHA=0)

•

C remains at 1 for (CPOL=1, CPHA=1)

Figure 3. SPI modes supported

M95320-DF Scheda tecnica(PDF) 10 Page - STMicroelectronics